Frequency 55 Aspheric
CooperVision
ManufacturerCooperVision
Brand familyFrequency
CategoryMonthly
Material (USAN)methafilcon A
Material classHydrogel
FDA groupIV
Dk (material)20 ×10⁻¹¹
Dk/t (@ -3.00 D)20.9 ×10⁻⁹
Water content55%
Base curve(s)8.4, 8.7 mm
Diameter(s)14.4 mm
Sphere power+8.00 to -10.00
Replacement1 month
Wear scheduledaily wear
UV blockingno
Pack sizes6
AvailabilityAspheric optics; also sold as Encore Premium.
Verify parameters against current manufacturer documentation before fitting.